SRC Member YzF Posted July 29, 2004 SRC Member Share Posted July 29, 2004 Thinking of DIY 2 x 150w MH onto hood. But my Hood height is only 8cm (from glass to the top ply) So it left me with the only option of diy the bulb to the hood with a reflector in between. Has anyone done this before? Is it advisable? Worried about the coverage of MH and the contact of water with the bulb. Quote YzF's Tank Link to comment Share on other sites More sharing options...
SRC Member weishun Posted July 29, 2004 SRC Member Share Posted July 29, 2004 Is there any tempered glass to protect the bulb from water splashes? Cos can be very dangerous if there is no protection to protect from splashes, cos the bulb will explode. Quote My 4 Footer Reef My Old 4FT Tank My Old 3FT Tank Link to comment Share on other sites More sharing options...
SRC Member Eric Posted July 30, 2004 SRC Member Share Posted July 30, 2004 Thinking of DIY 2 x 150w MH onto hood. But my Hood height is only 8cm (from glass to the top ply) So it left me with the only option of diy the bulb to the hood with a reflector in between. Has anyone done this before? Is it advisable? Worried about the coverage of MH and the contact of water with the bulb. Keep a lookout for the heat generated by the MH.........I have experience it burning my hood even after sticking aluminium tapes around it..........I surround the MH with some metal sheets to act as a heat shield more than a reflector. My hood is 14cm height and the 250W MH is 8cm away from the water surface. I have tried using normal glass as a water splash protector but the heat crack and shatter the glass. Now I'm going without the water splash protector, but got to be extra careful when switching ON and OFF the main return pump. Eric Quote Link to comment Share on other sites More sharing options...
SRC Member weishun Posted July 30, 2004 SRC Member Share Posted July 30, 2004 Brother... very very risky.... Quote My 4 Footer Reef My Old 4FT Tank My Old 3FT Tank Link to comment Share on other sites More sharing options...
SRC Member bubble_gum Posted July 30, 2004 SRC Member Share Posted July 30, 2004 i tot u can do tt with single ended bulbs? the se bulbs got uv shield itself correct me if im wrong Quote Link to comment Share on other sites More sharing options...
SRC Member ryz Posted July 30, 2004 SRC Member Share Posted July 30, 2004 UV shield is different.. u still need a shield to prevent water from reaching the bulb.. otherwise............ BOOM! Quote Live and Let Live Link to comment Share on other sites More sharing options...
SRC Member bubble_gum Posted July 30, 2004 SRC Member Share Posted July 30, 2004 UV shield is different.. u still need a shield to prevent water from reaching the bulb.. otherwise............ BOOM! okok i salah... sorry t5 user Quote Link to comment Share on other sites More sharing options...
SRC Member YzF Posted August 2, 2004 Author SRC Member Share Posted August 2, 2004 Been to a reefer's place and saw a diy MH done using victron MH. Sitting on L-frame aluminium. Can anyone here advise what is the minimum height clearance needed?? Quote YzF's Tank Link to comment Share on other sites More sharing options...
schema Posted August 2, 2004 Share Posted August 2, 2004 According to my MH set recommendation is 12 inches from water surface. Bro Eric, 8cm really near, u sure? are u going to boil your tank? Agree that the bulb(single or double end) need to be protected from water splash, use tempered glass or heat resist glass. Bro YzF, try to do frame that hangs your lights from steel cable, so can adjust height, more free play. Regards Mike Quote Link to comment Share on other sites More sharing options...
Sponsor dr evil Posted August 3, 2004 Sponsor Share Posted August 3, 2004 According to my MH set recommendation is 12 inches from water surface.Bro Eric, 8cm really near, u sure? are u going to boil your tank? Agree that the bulb(single or double end) need to be protected from water splash, use tempered glass or heat resist glass. Bro YzF, try to do frame that hangs your lights from steel cable, so can adjust height, more free play. Regards Mike i making a suspended MH fixture....stay tune......250watts Quote Link to comment Share on other sites More sharing options...
SRC Member ryan Posted August 3, 2004 SRC Member Share Posted August 3, 2004 if i'm not wrong, even if the bulb is not protected from water splashing with glass, the UV from the bulb will still fry the corals without the glass below it. read somewhere that someone connected MH without the glass and the corals were fried in seconds cuz of the UV. even thought the bulb said UV protected. so the glass below the MH has 2 purposes. firstly to protect the bulb from splashing water, and secondly to prevent it from frying corals! Quote Link to comment Share on other sites More sharing options...
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